238 MYOLOGY. 



Origin. From the brim and inferior surface of the pubis ; it 

 is also attached- to the pubio-femoral ligament, which passes 

 through its tendons of origin. 



Insertion. To a roughened surface on the inner side of the 

 femur, below the internal trochanter, and near the nutrient fora- 

 men. 



Relation. Anteriorly with the sartorius, part of the psoas 

 magnus, iliacus, and vastus internus ; posteriorly with the adductor 

 brevis and gracilis ; superiorly with the obturator externus. The 

 femoral vessels cross it. 



Action. To adduct and flex the thigh, and to rotate it in- 

 wards. 



TRICEPS ADDUCTOR FEMORIS. 



This name has been applied to a group of three muscles, situ- 

 ated on the inner surface of the thigh, and covered by the gracilis, 

 which act the part of adductors. They have also been described 

 as consisting of a biceps and a single muscle ; we describe them 

 as three distinct muscles, and name them, from before backwards, 

 the brevis, the longus, and the magnus. 



ADDUCTOR BREVIS. 



( Subpubio-fe m oralis. ) 

 (Fie. 76. g.) 



Situated on the inner aspect of the thigh, behind the pec- 

 tineus, this muscle is pyramidal, with the base upwards, its fibres 

 converging downwards and outwards. Fleshy, with tendinous 

 insertions inferiorly, it is often somewhat blended with the 

 longus. 



Origin. Superiorly from the inferior surface of the pubis. 



Insertion. To a square, roughened surface on the posterior 

 part of the shaft of the femur, about the middle, together with a 

 portion of the long adductor. 



Relation. Anteriorly with the pectineus ; posteriorly with the 

 longus ; externally with the gracilis ; internally with the obturator 

 externus. 



Action. To liex, adduct, and rotate the femur outwards. 



